On the Estimation of the Diffusion Coefficient and Distribution of Hydrogen in Stainless Steel
16 Pages Posted: 26 Jan 2020 First Look: Under Review
In this work, the localisation of hydrogen in an electrochemically charged stainless steel was investigated by Scanning Kelvin Probe Force Microscopy and Glow Discharge Optical Emission Spectroscopy analysis. Both techniques indicated a high hydrogen content at less than 90 micrometres under the charged surface. Thermal Desorption Spectroscopy was used to calibrate the data from both techniques and thus to calculate the hydrogen concentration. Finally, after assuming certain hypotheses, Fick's laws were used to calculate the coefficient of diffusion and subsurface concentration of hydrogen in cathodic charging conditions.
Keywords: Austenitic steels, Stainless steel, Hydrogen Absorption, Hydrogen Diffusion, Kelvin Probe Force Microscopy
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